Plaster mixer



Patented May 31, 1927.

N STATES FAT NEWMAN ESSICK, on LOS ANGELES, CALIFORNIA.

PLASTER MIXER. V

Application fi led September This invention relates to a mixer forcenientitious material and the like. A pop1ilar typeof mixer is aportableunit comprising a frame supported upon ground wheels andcarrying an engine, a mixer, and gearing connecting the engine andmixer. The present invention is in no way limited to such a unit but isespecially useful in such an ag roupment and will be described asembodied therein. V

In mixers of the character described, frequent dumping of the fbatches'is'required. \Vhereplaster is mixed, frequent washing of the mixingvessel is also necessary. The present invention contemplates-amixer-having as a mixing receptacle an' 'open drum,

in which a novel rotary impeller or shovel is disposed. The mixer isdumped by turning the drum about the impeller shaft axis. To providestability during, the mixing op eration, the drum is arranged'tobeturne'd only in one direction, the turning movement in the otherdirection being limited; The

resultis that the drum must be turned "to dumping position for dischargeof the wash ing liquid' lVashing in this manner requires that the mixerbe moved away from the batch receiving receptacle or that the latterbemoved, in order that the'washing liquid may not be discharged therein.The primary objectjofp the presentinventien is; to providea' mixerhaving ajfdrum WlliQll. may be turned tozone side for" duinpin-gthe'batch, tu'rnedto the opposite side for dis I tained by means of theembodiment of my inventionillustrated in the accompanying drawing, inwhich:

Fig. 1 is'a side elevation of a portable mixer unit; Fig. 2 is a sideelevation on an enlarged scale as seen looking in the direction of thearrow of Fig. 1, the'position' of the drum in mixing position beingshown.

in full lines and the position in batch dumping. position beingindicated by the dotted s, 1924. 'seriaiiio. 736,466.} 1

NT; orm

l nes, Fig. 3 side elevation of the fdru n 1 a and its mountingon anenlarged scalefa 1 portion of-the" drum being shown broken out 'Fig. 3is a plan view of'afragmentof the. impeller shown n Fig;3 Fig-. ,t

fragmentary view in Ysection'fonanienlarged' scale as seen on the'lineof Fig, 3;;and 'F1g.,5 is a, v1ew asjseen ontheline 5%5 of eferring C "Ii i more particularly" to Fig.1, a trailer adapted to be attached to amotor I car or truck is indicated generally by A. A"

housing indicated by "Bencloses thegmotor and associated means foroperating the mixer impeller. The inrxerpproper 'is marked C and isshown more in' detail in the other gfigures of the'drawing. v

The frame of the trailerhas mounted thereon bearing standardsfi and 7.Sup

which stir andtrowel the batch. In the present embodiment 'two shovelsare shown. Each shovel comprises a pair of arms 9 se-f cured to theshaft andangularly spaced.

Connecting apair of' arms are blades 10 arrangedso that if extended theywould wind 1 about the shaft in a spiral. One shovel winds intheopposite direction to the other- The advancing .endsof" the shovelsare so arranged withfres'pect to the direction of their revolution inmixing that the'plastic' mass contact with the bladeswill slidelongitudinally along the sameand inwardly" ofthe drum. The bladesareturned at their inner endsto form scoops-asindicatedfby 11. Securedtotheouter ends of the blades", are radial scraper blades 12. Thesebladesare arranged 'to scrape the heads of the drum, The shaft 8is-secured tothe engine contained Within the housing B so as to beoperated thereby.

Pivotally suspended upon thestandards by means of bushings 13 which arejournaled therein, is a drum having a cylindrical shell 14 open at thetop. Heads 15 and16 complete the drum.- Secured to the drum is a handle17 for convenience in turning the drum for dumping. This is the" onlydevice provided for turning the drum. Secured to the heads 15 and 16areangles 18 and 19.

The legs of the angles are mounted sofas to clear the standards andpermit the drum to y be turned. Pivotally -mounted upon the standards 6and 7 are lock'bars 20 an'd'21.

These bars are arranged so that h thgir v 7 ported by the standards isan impeller shaft 8. Mounted upon the shaft are impeller shovels longarms are, turned to'wardthe'heads iof the drum, the bars will restagainst the heads, the lower inner corners of the bars being rounded topermit jith'e.=1latter"t0 be. turned into locking position. When thelong arms are turned in an uprightposition,

the angle bars 18 andj19 will clear the standards and the lock bars.

. Suppose, the-lock bars are in locking position as ;shown in "thefigures or the drawing, and "theimpeller -is rotating in the di'-reotion of the-arrow shown in Fig. 32. The

drum G-avill" be held against rotation and {the b'at' ch 'within thedrum will bethoroughly ;-stirre.tl andeniixedg A i'te'r mixing has beenperi'ormed, snafu is desired to dump the batch, handle '17 is 'giaspecl,tl1e druin being turned as indicated in dotted lines in and held againstthe dragging action batch li'romthe Idrjum, the scooped ends of, .Itheblades [holding the 'plastio mass against of the impeller. Theimpellerfforces the slipping inwardly from the "blades and the radialblades scraping the mass "from the heads of the drum. If it is desiredto Wash (the -mixergthe ash liquid is applieldkw'hile the drumfis in themixing Lposition.v To

g dnmp the Wash Water, lock bars 20' and 21 .are. turned to uprightposition, thereby ,pe'rimitting the drum to be" swung in theoppositedireetionand' to dump 'the liquid upon lt-he; opposite side.fromthe position in Which the, batohesz are dumped. 'v During the washing and ,diseharging of the ,Washin g liquid, the impeller may berevolved thereby churnx .ing;;and. agitating the liquid; and thoroughlyWh at I Claim :is: a v

1. A mixer eomprising a 'frame having spac ed g sltandards, a;horizontally disposed rjournall-ed"between. said s'tandards and ;l1av1ngmixing, blades. thereon a :driun susgagement with the drum head topermit the drum to be Iotaltd i'n either direction.

said drum, and locking members onsaid.

standards:"arrangetlto be disposed at vWill in trontof said abutmentmembers ,Where- Thy to hold saidjdrumagains't rotation in -onetlH'GClZIOD,

'Z 'A niXer comprising a frame having "spaced standards, a horizontallydisposedlsha'ft ournalled between "said standards and"fhaving'inixingblades thereon, a drum susfl'pendedso as togibe't'urnedaboutsaid shaft "and having afnopening forthe introduction "anddischargeof a-chargeo f material said frame being. arranged toperniitflfreelateral ilisohfa'i'ge er said drum on bothsides abutmentangles 'egrtending from the heads of said drum, "lock means pivotallymounted on :said standards so as to be swung into registration with saidbars to'hold said drum against 'rotationin one direction With itsopening uppermost for mixing.

3. A n'nxer oomprisinga frame, a "drum -rotat'ably suspended in saidframe an'd'having an opening for the introduction and discharge ofach'arge of material, said'frame being clear of'obstruotions at the sideWhere bysaid drum maybe turned to 'disehargeat eithersidethereof, meansupon said tra ner andengagingthe end of said drum *t'o'pen nnt rotationof the drum in only one; direction, 's'a'id mean's being movable out ofen- I In Witness that-I olai'm the for'egoirigiI ha'tehereuntosubscribed my nameithis 18th da of Au-gust, 1924.

I LESSIOK,

